001     282288
005     20260217133630.0
024 7 _ |2 doi
|a 10.1177/13872877251379466
024 7 _ |2 pmid
|a pmid:41004660
024 7 _ |2 ISSN
|a 1387-2877
024 7 _ |2 ISSN
|a 1875-8908
037 _ _ |a DZNE-2025-01259
041 _ _ |a English
082 _ _ |a 610
100 1 _ |a Tanaka, Emi
|b 0
245 _ _ |a Modulation of middle-latency somatosensory evoked magnetic field waveforms associated with the pathophysiological states of Alzheimer's disease.
260 _ _ |a Amsterdam
|b IOS Press
|c 2025
336 7 _ |2 DRIVER
|a article
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|a Output Types/Journal article
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336 7 _ |2 BibTeX
|a ARTICLE
336 7 _ |2 ORCID
|a JOURNAL_ARTICLE
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|a Journal Article
520 _ _ |a BackgroundAlzheimer's disease (AD) frequently causes epilepsy and myoclonus. These symptoms are thought to be associated with neuronal hyperexcitability, highlighting the need for biomarkers that reflect synaptic functional alterations.ObjectiveWe aimed to examine changes in neuronal excitability associated with AD progression using magnetoencephalography (MEG). Furthermore, we investigated the relationship between alterations in electromagnetic signals and other neuroimaging biomarkers.MethodsWe measured middle-latency somatosensory evoked magnetic fields (m-SEFs) following right median nerve stimulation in 45 individuals, comprising 6, 8, and 31 individuals with AD dementia (ADD), mild cognitive impairment (MCI), and cognitively healthy older adults, respectively. Cortical reactivity relative to the primary somatosensory response (N20 m) was assessed using normalized m-SEF waveforms. Additionally, we analyzed associations between these waveforms and amyloid-β (Aβ) deposition, regional glucose metabolism, and gray matter volume using positron-emission tomography and magnetic resonance imaging.ResultsThe m-SEF waveform exhibited six components (M2-M7) within 150 ms of the N20 m (M1) response. The m-SEF waveforms tended to be enlarged in ADD and MCI, with a significant enhancement of M2 in ADD. The amplitude of M7 at approximately 100 ms latency was significantly and positively correlated with local Aβ deposition in the sensorimotor cortex. Moreover, regional glucose hypometabolism in the hippocampus and pulvinar was significantly associated with enlargement of the M4, M6, and M7 components.ConclusionsThese findings indicate that cortical responses to somatosensory stimulation are modulated by AD progression. M-SEF may serve as a potential marker for evaluating cortical excitability in the sensorimotor cortex.
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650 _ 7 |2 Other
|a Alzheimer's disease
650 _ 7 |2 Other
|a amyloid-β protein
650 _ 7 |2 Other
|a cortical excitability
650 _ 7 |2 Other
|a evoked potentials
650 _ 7 |2 Other
|a glucose metabolism
650 _ 7 |2 Other
|a magnetoencephalography
650 _ 7 |2 Other
|a somatosensory
650 _ 7 |2 NLM Chemicals
|a Amyloid beta-Peptides
650 _ 2 |2 MeSH
|a Humans
650 _ 2 |2 MeSH
|a Alzheimer Disease: physiopathology
650 _ 2 |2 MeSH
|a Alzheimer Disease: diagnostic imaging
650 _ 2 |2 MeSH
|a Male
650 _ 2 |2 MeSH
|a Evoked Potentials, Somatosensory: physiology
650 _ 2 |2 MeSH
|a Aged
650 _ 2 |2 MeSH
|a Female
650 _ 2 |2 MeSH
|a Magnetoencephalography
650 _ 2 |2 MeSH
|a Magnetic Resonance Imaging
650 _ 2 |2 MeSH
|a Positron-Emission Tomography
650 _ 2 |2 MeSH
|a Aged, 80 and over
650 _ 2 |2 MeSH
|a Cognitive Dysfunction: physiopathology
650 _ 2 |2 MeSH
|a Cognitive Dysfunction: diagnostic imaging
650 _ 2 |2 MeSH
|a Median Nerve: physiopathology
650 _ 2 |2 MeSH
|a Middle Aged
650 _ 2 |2 MeSH
|a Amyloid beta-Peptides: metabolism
650 _ 2 |2 MeSH
|a Somatosensory Cortex: physiopathology
700 1 _ |a Nihashi, Takashi
|b 1
700 1 _ |a Kato, Takashi
|b 2
700 1 _ |0 0000-0001-7810-8984
|a Arahata, Yutaka
|b 3
700 1 _ |a Takeda, Akinori
|b 4
700 1 _ |a Sakurai, Keita
|b 5
700 1 _ |a Yokoi, Katsunori
|b 6
700 1 _ |a Iwata, Kaori
|b 7
700 1 _ |0 P:(DE-2719)2812059
|a Diers, Kersten
|b 8
|u dzne
700 1 _ |a Maess, Burkhard
|b 9
700 1 _ |0 0000-0002-4259-1297
|a Nakamura, Akinori
|b 10
773 _ _ |0 PERI:(DE-600)2070772-1
|a 10.1177/13872877251379466
|g Vol. 108, no. 2, p. 862 - 872
|n 2
|p 862 - 872
|t Journal of Alzheimer's disease
|v 108
|x 1387-2877
|y 2025
856 4 _ |u https://pub.dzne.de/record/282288/files/DZNE-2025-01259_Restricted.pdf
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